<template>
    <el-container class="home_contanier">
        <!-- 头部区域 -->
        <el-header>
            <div>
                <img src="../assets/heima.png" alt="">
                <span>电商后台管理系统</span>
            </div>
            <el-button type="info" @click="logout">退出</el-button>
        </el-header>
        <!-- 页面主体区域 -->
        <el-container>
            <!-- 侧边栏 -->
            <el-aside width="200px">
                <div class="toggle-button" @click="toggleCollapse ">|||</div>
                <!-- 侧边栏菜单区域 -->
                <el-menu :unique-opened="true" background-color="#333744"
                    text-color="#fff"  :default-active="activePath"
                    active-text-color="#409EFF" :collapse="isCollapse" :router="true">
                    <!-- 一级菜单 -->
                    <el-submenu :index="item.id+'' " v-for="item in menulist" :key="item.id">
                        <!-- 一级菜单的模板区域 -->
                        <template slot="title" >
                        <!-- 图标 -->
                        <i :class="iconsObj[item.id]"></i>
                        <!-- 文本 -->
                        <span>{{item.authName}}</span>
                        </template>

                        <!-- 二级菜单 -->
                        <el-menu-item :index="'/'+subItem.path" v-for="subItem in item.children" :key="subItem.id" @click="saveNavState('/'+subItem.path)"> 
                            <!-- 二级菜单的模板区域 -->
                            <template slot="title">
                            <!-- 图标 -->
                            <i class="el-icon-menu"></i>
                            <!-- 文本 -->
                            <span>{{subItem.authName}}</span>
                            </template>
                        </el-menu-item>
                    </el-submenu>
                   
                    </el-menu>

            </el-aside>
            <!-- 右侧主体内容 -->
            <el-main>
                <!-- 路由占位符 -->
                <router-view></router-view>
            </el-main>
        </el-container>
    </el-container>
</template>

<script>
export default {
    data(){
        return{
            menulist:[],
            iconsObj:{
                '125':'iconfont icon-user',
                '103':'iconfont icon-tijikongjian',
                '101':'iconfont icon-shangpin',
                '102':'iconfont icon-danju',
                '145':'iconfont icon-baobiao'
            },
            //是否折叠
            isCollapse:false,
            //被激活的链接地址
            activePath:'',
        }
    },
    created(){
        this.getMenuList()
        this.activePath=window.sessionStorage.getItem('activePath')
    },
    methods:{
        logout(){
            window.sessionStorage.clear()
            this.$router.push('/login')
        },
        //获取所有的菜单
        async getMenuList(){
            const {data:res}= await this.$http.get('menus')
            if(res.meta.status !== 200) return this.$message.error(res.meta.msg)
            this.menulist=res.data
            console.log(res)
        },
        //点击按钮，切换菜单的折叠与展开
        toggleCollapse(){
            console.log("111")
            this.isCollapse=! this.isCollapse
        },
        //保存链接的激活状态
        saveNavState(activePath){
            window.sessionStorage.setItem('activePath',activePath)
            this.activePath=activePath
        }
    }
}
</script>

<style lang="less" scoped >
    .home_contanier{
        height: 100%;
    }
    .el-header{
        background-color: #373D41;
        display: flex;
        justify-content: space-between;
        padding-left:0 ;
        align-content: center;
        color: #fff;
        font-size: 20px;
        >div{
            display: flex;
            align-items: center;
            span{
                margin-left: 15px;
            }
        }
    }
    .el-aside{
        background-color: #333744;
        .toggle-button{
            background-color: #4A5064;
            font-size: 10px;
            line-height: 24px;
            color:#fff;
            text-align: center;
            letter-spacing: 0.2em;
            cursor: pointer;
        }
        .el-menu{
            border-right: none;
        }
    }
    .el-main{
        background-color: #eaedf1;
    }
    .iconfont{
        margin-right: 10px;
    }
</style>